CN110104845A - A kind of percolation liquid membrane processing method reducing concentration output of fluid - Google Patents
A kind of percolation liquid membrane processing method reducing concentration output of fluid Download PDFInfo
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- CN110104845A CN110104845A CN201910502386.9A CN201910502386A CN110104845A CN 110104845 A CN110104845 A CN 110104845A CN 201910502386 A CN201910502386 A CN 201910502386A CN 110104845 A CN110104845 A CN 110104845A
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/442—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by nanofiltration
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/444—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by ultrafiltration or microfiltration
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/70—Treatment of water, waste water, or sewage by reduction
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/722—Oxidation by peroxides
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/725—Treatment of water, waste water, or sewage by oxidation by catalytic oxidation
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/06—Contaminated groundwater or leachate
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2305/00—Use of specific compounds during water treatment
- C02F2305/02—Specific form of oxidant
- C02F2305/026—Fenton's reagent
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Abstract
The present invention relates to the percolation liquid membrane processing methods that one kind can reduce concentration output of fluid comprising following steps: S1. produces in water addition salt acid for adjusting pH value to meeting Fenton's reaction requirement to ultrafiltration that ultrafiltration water producing tank is collected into；S2. it is produced in the ultrafiltration after Fenton's reaction Chi Zhongxiang mixes up pH and adds hydrogen peroxide and ferrous sulfate in water, carry out Fenton's reaction, the COD for making ultrafiltration produce water is reduced to setting value or less；S3. addition reducing agent, subsequently into filtration treatment in plate-type hyperfiltration device, produces water and enters intermediate water pot storage to remove the fragrant remaining oxidizing species of reaction, after having nanofiltration system starting liquid level, starting nanofiltration system progress nanofiltration processing can qualified discharge after nanofiltration production water pH pulls back to middle life.Advantage is, by Fenton's reaction and plate-type hyperfiltration, treated produces water, can reach discharge standard after nanofiltration system, to eliminate next stage reverse osmosis membrane processing process, the yield of concentrate is greatly reduced and greatly reduce cost of investment.
Description
Technical field
The invention belongs to the rubbish percolation liquid membrane process fields of garbage incinerating power plant, and in particular to one kind can reduce concentration
The percolation liquid membrane processing method of output of fluid.
Background technique
As the requirement that country administers environmental protection industry (epi) and water pollution is higher and higher, consumer waste infiltration liquid handles work
Skill is gradually increased with drainage requirement, and domestic rubbish disposal standard of drainage mainly has " household refuse landfill sites contamination control mark at present
It is quasi- " (GB16889-2008) and " integrated wastewater discharge standard " (GB8978-1996) two class, to meet above-mentioned two category
Standard, percolate prevailing technology is all made of ultrafiltration, nanofiltration and reverse osmosis membrane separation advanced treatment process at present, by ultrafiltration, receives
Water outlet after filter, reverse osmosis membrane group technology fully meets and is better than above-mentioned two class standard, and film advanced treatment process is with its maintenance
Simplicity, stable effluent quality, processing cost is cheap and has the larger market advantage.But because of above-mentioned nanofiltration, reverse osmosis membrane depth
Science and engineering skill, principle are to be filtered the macromolecular substances such as salinity and organic pollutant by the way of physics screening
Screening, salinity and organic pollutant are there is no degrading and reducing, the only process of pollutant concentration and separation, thus sieve and
Filtered clear liquid water stabilization is up to standard, and then to become pollutant concentration higher for salinity and organic pollutant through retaining, more
Intractable concentrate.The common processing mode of garbage burning factory is then that spray system is utilized back to return the consumption of spray burner hearth, lime at present
Pulping system is starched using consumption, but since its yield is larger, refuse thermal value low garbage burning factory in part can not completely consume,
Then in order to solve the problems, such as concentrate, it has to sacrifice garbage power energy benefit, and increase concentrate and return discharge rate, to solve the hardly possible
Topic.And household refuse landfill sites because without for return spray and the secondary appointed condition used, can only by recharge to landfill yard, but
With the increase of landfill yard runing time, pollutant is not eliminated always, and continuous recharge leads to newly generated Sewage instead
Dye object is constantly enriched with, and concentration constantly increases, and subsequent treatment process is caused to handle more difficult situation.Therefore the part by-product
Processing and whereabouts, where the bottleneck for already becoming membrane treatment process or even percolate treating process, its by-product is subtracted
Amount and processing have significance.
Summary of the invention
The present invention provides a kind of percolation liquid membrane processing method that can reduce concentration output of fluid, it is intended to reduce pollutant from source
Concentration reduces film advanced treating process, reduces the yield of film concentrate, to solve garbage incinerating power plant concentration output of fluid mistake
Greatly, can not it is completely internal consumption and caused by economic benefit reduce problem.
The technical scheme to solve the above technical problems is that at a kind of percolation liquid membrane that can reduce concentration output of fluid
Reason method comprising following steps:
S1. addition salt acid for adjusting pH value is produced in water to meeting Fenton's reaction requirement to ultrafiltration that ultrafiltration water producing tank is collected into；
S2. it is produced in the ultrafiltration after Fenton's reaction Chi Zhongxiang mixes up pH and adds hydrogen peroxide and ferrous sulfate in water, carry out Fenton
Reaction, the COD for making ultrafiltration produce water are reduced to setting value or less；
S3. it is remaining to remove fragrant reaction that the ultrafiltration after being reduced to setting value or less to COD value produces addition reducing agent in water
Oxidizing species produce water and enter intermediate water pot storage, have nanofiltration system subsequently into filtration treatment in plate-type hyperfiltration device
After starting liquid level, starting nanofiltration system carries out nanofiltration processing can row up to standard after nanofiltration production water pH is pulled back between 6.5-7.5
It puts.
Based on the above technical solution, the present invention can also do specific choice or optimal selection further below.
Preferably, salt acid for adjusting pH value is added in S1 meet Fenton's reaction requirement to 4.5-5.0.
It should be noted that the oxidisability of Fenton reagent is best between pH3~5, it is generally recognized that when pH is between 2-4
Reaction is best, but pH will pull back to neutrality when water qualified discharge, if Fenton's reaction is completed under the conditions of pH is lower, on the one hand
Input amount a larger increase of hydrochloric acid, the usage amount of liquid alkaline also a larger increase, is unfavorable for cost when another aspect pH pulls back to neutrality
It calculates, therefore the pH value of preferred Fenton's reaction is between 4.5-5.0 in the present invention.
Specifically, mixing up the ultrafiltration after pH to produce the COD of water is 500-600mg/L, it is preferred that the additive amount of hydrogen peroxide in S2
The mass ratio of COD content in water is produced as 1.2:1 with ultrafiltration, and the molar ratio of ferrous sulfate and hydrogen peroxide is 1:10.
Preferably, the setting value of COD described in S2 is 200mg/L.
Specifically, the reducing agent added in S3 is iron powder, zinc powder, frerrous chloride or ferrous sulfate, additive amount is with can
The oxidation-reduction potential for making corresponding ultrafiltration produce water is down to subject to 150mV or less.
Specifically, the input amount of reducing agent is 10-20ppm.
Specifically, in S3 through plate-type hyperfiltration device treated produce water silt density index (SDI) below 5.
Compared with prior art, the beneficial effects of the present invention are:
Original mainstream membrane treatment process is that ultrafiltration, nanofiltration, reverse osmosis membrane are applied in combination, and the present invention is improved to surpass
Filter, Fenton oxidation, plate-type hyperfiltration and nanofiltration combination, the combination of Fenton's reaction and plate-type hyperfiltration can direct rows up to standard after making nanofiltration
It puts, saves original reverse osmosis membrane advanced treating process, the reverse osmosis concentrated liquid yield of system inflow 25% can be reduced,
Greatly reduce the production burden of waste incineration production line；Fenton reactor is obviously low with total investment of plate-type hyperfiltration equipment
In the equipment investment of former reverse osmosis membrane process, while maintenance cost is greatly reduced.
Detailed description of the invention
Fig. 1 is the process flow diagram of the percolation liquid membrane processing method provided by the invention for reducing concentration output of fluid.
Specific embodiment
Principles and features of the present invention are described below in conjunction with drawings and the specific embodiments, example is served only for solving
The present invention is released, is not intended to limit the scope of the present invention.
As shown in Figure 1, the present invention provides a kind of percolation liquid membrane processing method that can reduce concentration output of fluid comprising as follows
Step:
S1. addition salt acid for adjusting pH value is produced in water to meeting Fenton's reaction requirement to ultrafiltration that ultrafiltration water producing tank is collected into；
S2. it is produced in the ultrafiltration after Fenton's reaction Chi Zhongxiang mixes up pH and adds hydrogen peroxide and ferrous sulfate in water, carry out Fenton
Reaction, the COD for making ultrafiltration produce water are reduced to setting value or less；
S3. it is remaining to remove fragrant reaction that the ultrafiltration after being reduced to setting value or less to COD value produces addition reducing agent in water
Oxidizing species produce water and enter intermediate water pot storage, have nanofiltration system subsequently into filtration treatment in plate-type hyperfiltration device
After starting liquid level, starting nanofiltration system carries out nanofiltration processing can row up to standard after nanofiltration production water pH is pulled back between 6.5-7.5
It puts.
Used method is then conventional method unless otherwise noted in following embodiment, if used drug is without spy
It does not mentionlet alone bright, is commercial product.
Embodiment 1
A kind of percolation liquid membrane processing method reducing concentration output of fluid comprising following steps:
1) after ultrafiltration water producing tank collects ultrafiltration production water, according to ultrafiltration water yield and pH situation, salt acid for adjusting pH value is added extremely
Between 4.5-5, enter subsequent processing after reaching the reaction condition of Fenton's reaction；
2) after Fenton's reaction pond receives ultrafiltration production water, ferrous sulfate and hydrogen peroxide stirring is added, wherein hydrogen peroxide adds
The mass ratio of amount and ultrafiltration COD content is 1.2:1, and the dosage of ferrous sulfate is that the molar ratio of hydrogen peroxide dosage is 1:10,
Ultrafiltration is produced into the COD in water by 500-600mg/L, degradation to 200mg/L or less；
3) larger oxidation will be generated, therefore to subsequent plate-type hyperfiltration membrane and nanofiltration system to ensure subsequent membrane module
Service life, the reducing agent ferrous sulfate of 10-20ppm need to be added, oxidation-reduction potential is down to 150mv hereinafter, into plate
Formula ultrafiltration apparatus.Mixed liquor after Fenton's reaction carries a large amount of suspended matters, if being directly entered nanofiltration membrane system at this time, will cause
Nanofiltration membrane blocks rapidly.Therefore the part suspension enters plate-type hyperfiltration device, and after carrying out low energy consumption ultra-filtration filters, pollution refers to
Number SDI≤5 reach nanofiltration membrane flow condition and enter next process, and the suspended matter being concentrated after filtered will form sludge, and need
Mud discharging periodically is carried out to it, to guarantee plate-type hyperfiltration strainability；Production water enters intermediate water pot and carries out storage water storage, has
After nanofiltration system starts liquid level, start nanofiltration system, the water outlet pH value of nanofiltration at this time is still maintained at 5 or so, need to add a small amount of liquid
Sodium hydroxide carries out pH value and pulls back between 6.5-7.5, is detected the COD of the water outlet of nanofiltration at this time in 30mg/L or less and remaining is each
Index is also all satisfied emission request.
Embodiment 2
A kind of percolation liquid membrane processing method reducing concentration output of fluid comprising following steps:
1) after ultrafiltration water producing tank collects ultrafiltration production water, according to ultrafiltration water yield and pH situation, salt acid for adjusting pH value is added extremely
Between 3.5-4.5, enter subsequent processing after reaching the reaction condition of Fenton's reaction；
2) after Fenton's reaction pond receives ultrafiltration production water, ferrous sulfate and hydrogen peroxide stirring is added, wherein hydrogen peroxide adds
The mass ratio of amount and ultrafiltration COD content is 1.3:1, and the dosage of ferrous sulfate is that the molar ratio of hydrogen peroxide dosage is 1:10,
Ultrafiltration is produced into the COD in water by 500-600mg/L, degradation to 200mg/L or less；
3) larger oxidation will be generated, therefore to subsequent plate-type hyperfiltration membrane and nanofiltration system to ensure subsequent membrane module
Service life, the reducing agent zinc powder of 10-20ppm need to be added, oxidation-reduction potential is down to 150mv hereinafter, into board-like super
Filter device.Mixed liquor after Fenton's reaction carries a large amount of suspended matters, if being directly entered nanofiltration membrane system at this time, will cause nanofiltration
Film blocks rapidly.Therefore the part suspension enters plate-type hyperfiltration device, after carrying out low energy consumption ultra-filtration filters, pollution index
SDI≤5 reach nanofiltration membrane flow condition and enter next process, and the suspended matter being concentrated after filtered will form sludge, and need to determine
Phase carries out mud discharging to it, to guarantee plate-type hyperfiltration strainability；Production water enters intermediate water pot and carries out storage water storage, has and receives
After filter system starts liquid level, start nanofiltration system, the water outlet pH value of nanofiltration at this time is still maintained at 5 or so, need to add a small amount of liquid hydrogen
Sodium oxide molybdena carry out pH value pull back between 6.5-7.5, through detected nanofiltration at this time water outlet COD 30mg/L or less and remaining respectively refer to
Mark is also all satisfied emission request.
Embodiment 3
A kind of percolation liquid membrane processing method reducing concentration output of fluid comprising following steps:
1) after ultrafiltration water producing tank collects ultrafiltration production water, according to ultrafiltration water yield and pH situation, salt acid for adjusting pH value is added extremely
Between 2.5-3.5, enter subsequent processing after reaching the reaction condition of Fenton's reaction；
2) after Fenton's reaction pond receives ultrafiltration production water, ferrous sulfate and hydrogen peroxide stirring is added, wherein hydrogen peroxide adds
The mass ratio of amount and ultrafiltration COD content is 1.2:1, and the dosage of ferrous sulfate is that the molar ratio of hydrogen peroxide dosage is 1:10,
Ultrafiltration is produced into the COD in water by 500-600mg/L, degradation to 200mg/L or less；
3) larger oxidation will be generated, therefore to subsequent plate-type hyperfiltration membrane and nanofiltration system to ensure subsequent membrane module
Service life, the reducing agent iron powder of 10-20ppm need to be added, oxidation-reduction potential is down to 150mv hereinafter, into board-like super
Filter device.Mixed liquor after Fenton's reaction carries a large amount of suspended matters, if being directly entered nanofiltration membrane system at this time, will cause nanofiltration
Film blocks rapidly.Therefore the part suspension enters plate-type hyperfiltration device, after carrying out low energy consumption ultra-filtration filters, pollution index
SDI≤5 reach nanofiltration membrane flow condition and enter next process, and the suspended matter being concentrated after filtered will form sludge, and need to determine
Phase carries out mud discharging to it, to guarantee plate-type hyperfiltration strainability；Production water enters intermediate water pot and carries out storage water storage, has and receives
After filter system starts liquid level, start nanofiltration system, the water outlet pH value of nanofiltration at this time is still maintained at 4 or so, need to add certain quantity of fluid
Sodium hydroxide carries out pH value and pulls back between 6.5-7.5, is detected the COD of the water outlet of nanofiltration at this time in 30mg/L or less and remaining is each
Index is also all satisfied emission request.
It should be noted that reaching emission request after nanofiltration processing in the various embodiments described above, without further using
Reverse osmosis membrane processing, nanofiltration membrane system only generates the concentration liquid measure for being equivalent to inflow 15% at this time, handles according to original process,
Continue to be further processed using reverse osmosis membrane into system after nanofiltration membrane system, then generation is also equivalent to inflow 25%
Liquid measure is concentrated, namely the processing method provided through the invention carries out percolation liquid membrane processing, and the production of concentrate can be greatly lowered
Amount.
The foregoing is merely presently preferred embodiments of the present invention, is not intended to limit the invention, it is all in spirit of the invention and
Within principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (7)
1. the percolation liquid membrane processing method that one kind can reduce concentration output of fluid, which comprises the steps of:
S1. addition salt acid for adjusting pH value is produced in water to meeting Fenton's reaction requirement to ultrafiltration that ultrafiltration water producing tank is collected into；
S2. it is produced in the ultrafiltration after Fenton's reaction Chi Zhongxiang mixes up pH and adds hydrogen peroxide and ferrous sulfate in water, carry out Fenton's reaction,
The COD for making ultrafiltration produce water is reduced to setting value or less；
S3. the ultrafiltration after being reduced to setting value or less to COD value, which produces, adds reducing agent to remove the fragrant remaining strong oxygen of reaction in water
The property changed substance produces water and enters intermediate water pot storage, have nanofiltration system starting subsequently into filtration treatment in plate-type hyperfiltration device
After liquid level, starting nanofiltration system carries out nanofiltration processing can qualified discharge after nanofiltration production water pH is pulled back between 6.5-7.5.
2. the percolation liquid membrane processing method that one kind according to claim 1 can reduce concentration output of fluid, which is characterized in that S1
Middle addition salt acid for adjusting pH value meets Fenton's reaction requirement to 4.5-5.0.
3. the percolation liquid membrane processing method that one kind according to claim 1 can reduce concentration output of fluid, which is characterized in that adjust
The COD that ultrafiltration after good pH produces water is 500-600mg/L, and the additive amount of hydrogen peroxide and ultrafiltration produce the matter of COD content in water in S2
Ratio is measured as 1.2:1, the molar ratio of ferrous sulfate and hydrogen peroxide is 1:10.
4. the percolation liquid membrane processing method that one kind according to claim 1 can reduce concentration output of fluid, which is characterized in that S2
Described in COD setting value be 200mg/L.
5. the percolation liquid membrane processing method that one kind according to claim 1 can reduce concentration output of fluid, which is characterized in that S3
The reducing agent of middle addition is iron powder, zinc powder, frerrous chloride or ferrous sulfate, and additive amount is can make corresponding ultrafiltration produce water
Oxidation-reduction potential is down to subject to 150mV or less.
6. the percolation liquid membrane processing method that one kind according to claim 5 can reduce concentration output of fluid, which is characterized in that also
The input amount of former agent is 10-20ppm.
7. one kind according to any one of claims 1 to 6 can reduce the percolation liquid membrane processing method of concentration output of fluid, special
Sign is, through plate-type hyperfiltration device, treated produces the silt density index (SDI) of water below 5 in S3.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113292203A (en) * | 2021-06-03 | 2021-08-24 | 广东雅迪环保设备有限公司 | Method for removing white in landfill leachate |
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Application publication date: 20190809 |